Thrips feed on vegetation and often enter a structure when residents bring in infested plants by mistake. Sadly thrips are difficult to eradicate once they have taken hold of a plant. Thrips are tiny and hard to spot until after they cause damage to the plants they feed upon and their fecal matter deposited on the leaves of their host plants is noticed. Probably the most common reason your Monstera leaves are turning yellow is from the soil being too dry. The size is either large or small depending on the nature of the damage it brings on the surface of the leaves. Thanks again in advance! Host plants include onions, beans, carrots, squash and many other garden vegetables, and many flowers, especially gladioli and roses. I found what I thought looked like thrips about 2 weeks ago so I've been giving it a bath every 4-5 days and spraying it with neem oil. plantladylin said:Hi EmelieG, Welcome to the site! Or is it a variegation mutation (I wish?) Native to the rainforests of Central America, the Monstera deliciosa plant is also known as the "tropical split-leaf philodendron." Just like the other pests, there are many different types of thrips. Thrips are teeny tiny, just like spider mites, making them almost impossible to detect until the damage has started or is well on its way. Monstera brown spots can either be caused by excesses and/or deficiencies in certain factors. The pests seek out water and may also travel indoors via damp laundry. Ritual washing of the leaves keeps their damage at bay, and plants also like it. I don't see any insects or insect damage to your Ceriman (Monstera deliciosa) The holes and marks on the leaves appears to be normal mechanical damage, which usually happens from the plant being bumped or bruised during transit to/from the nursery or garden center. They leap or fly away when disturbed. Ok. You guys are reassuring me about the damage on the leaves. 11. You see, plants that are damaged release hormones into the air that say ‘AAAAAAH I’M DAMAGED HAAAAAAALP’. Thrips (Order: Thysanoptera) Thrips are technically a less common insect pest, but I've found that they are most prevalent in my household. Thrips. If you notice the lower leaves (especially the oldest leaves) are turning yellow, go ahead and feel the soil. Could it be diseased? A blackish-brown thrips with banded brown and white wings that causes extensive silvering of the leaves. If your soil has gone too dry (completely dry), the oldest leaves will turn yellow first. Why is my Monstera getting yellow leaves? About Thrips on Houseplants. Banded palm thrips (Parthenothrips dracaenae) Occurs all year round on various glasshouse and houseplants, especially those with relatively tough leaves such as Ficus, Dracaena, Citrus, Monstera, Schefflera and palms. An interesting fact: whether you have 1 or 500, you still call it/them thrips. Monstera leaves with brown pots may also appear necrotic. Alas, … Thrips are likely to cause minimal damage unless the larvae get in to a freshly growing leaf, where they can cause quite a bit of "leaf mining" damage. Like any pest, it is best to identify them early in order to have the best chance in getting rid of them. Or is it something else? Damage. BUT they can be managed with diligence. A lot of pests LOVE new growth and are attracted to it, but also if the new growth is damaged, pests that are attracted to damage (hey, thrips) rock up. Thrips on indoor plants are not as common as thrips on outdoor plants, but they do occur and it is important to take care of them before the damage becomes too difficult to deal with. Extremely active, thrips feed in large groups. This climbing evergreen is a popular easy-to-grow houseplant and a favorite of many interior designers for both residential and commercial spaces. There is no singular. 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